Dry dust removal system for converter primary flue gas ultra-low emission and smoke plume elimination

Abstract

The invention relates to a dry dust removal system for converter primary flue gas ultra-low emission and smoke plume elimination. A converter is connected with a vaporization cooling flue, and the vaporization cooling flue is connected with an evaporation cooler; the evaporation cooler is sequentially connected with a multi-tube type anti-deflagration flame arrester, a pulse cloth bag dust remover, a smoke plume eliminating device, a fan, a switching station and a chimney through a flue gas pipeline, and the switching station is further connected with a gas cabinet; and the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover are connected with a pneumatic ash conveying system, the pneumatic ash conveying system is connected with a compressed nitrogen gas source, and the compressed nitrogen gas source is further connected with the evaporation cooler, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust collector. According to the dry electric-bag combination dust removal system for converter primary flue gas ultra-low emission and smoke plume elimination, electrostatic dust removal is not adopted, so that the explosion venting problem of the electrostatic dust remover is eliminated; the design is anti-explosion, the structure is anti-condensation, and the emission of fuel smoke is guaranteed to reach standard; and water vapor in the flue gas can be eliminated, so that the corrosion to the pipeline can be reduced, and smoke plumes can be eliminated.

Description

technical field [0001] The invention relates to a dust removal system, in particular to a dry dust removal system for ultra-low discharge of primary flue gas of a converter and elimination of smoke plume. Background technique [0002] Converter steelmaking has become the main steelmaking process of iron and steel enterprises. During the blowing process, the converter produces gas containing mainly carbon monoxide, a small amount of carbon dioxide and other trace components, which also contains a large amount of iron oxide, metal iron particles, and other gases. Fine particles of solid dust will seriously pollute the atmosphere and workshop environment. Therefore, it is an urgent problem to be solved to improve the technical level of the converter dust removal system and effectively control and reduce the emission of air pollutants in steelmaking. [0003] China's iron and steel industry is in a period of structural adjustment, optimization and upgrading, and is facing incre...

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Problems solved by technology

[0005] (1) The whole process of the traditional OG method dust removal system adopts wet treatment process. The disadvantages of this technology: ①The dust content of the treated gas is relatively high, which cannot reach ≤10mg / m 3 , to use this gas, it is also necessary to install an electrostatic precipitator at the rear for fine dust removal, and reduce its dust concentration to ≤10mg / m 3 ; ② There is secondary pollution in the system, and its sewage needs to be treated; ③ The resistance of the system is large, so the energy consumption is high and the floor area is large

[0015] 1. There is always a high risk of gas explosion in dry dust removal, and the electrostatic precipitator cannot avoid the problem of high-voltage flashover of the electric field, which causes the explosion venting problem of the electrostatic precipitator

During the actual production and operation of the converter primary flue gas dry electrostatic precipitator system, due to the frequent occurrence of explosion and smoke problems, the converter primary flue gas dry precipitator system often cannot ensure that the flue gas emission is stable and up to standard;

[0016] 2. Due to the evaporative cooling mechanism adopted by the dry dust removal system, the recovered gas contains a lot of water vapor, and there is a certain degree of corrosion in the gas pipeline and equipment;

[0017] 3. Due to the evaporative cooling mechanism adopted by the dry dust removal system, the exhausted flue gas contains a lot of water vapor, and the problem of the plume of the exhausted flue gas is more prominent

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